Estrogen receptor 1 gene expression and its combination with estrogen receptor 2 or aromatase expression predicts survival in non-small cell lung cancer. oleh Unai Aresti, Sergio Carrera, Eluska Iruarrizaga, Natalia Fuente, Ines Marrodan, Abigail Ruiz de Lobera, Alberto Muñoz, Aitziber Buque, Elizabeth Condori, Irene Ugalde, Begoña Calvo, Guillermo López Vivanco